Sodium Iodide → 1-(3-benzyloxy-propyl)-3-(2,3,4,6-tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-4-[2-(4-pivaloyloxyphenyl)ethyl]-1H-pyrazolo[3,4-b]pyridine

HRID 2223964Notes

Reaction equation

HRID 2223964 reaction equation
[C:1]([O:7][C@@H:8]1[C@@H:13]([O:14][C:15](=[O:20])[C:16]([CH3:19])([CH3:18])[CH3:17])[C@H:12]([O:21][C:22](=[O:27])[C:23]([CH3:26])([CH3:25])[CH3:24])[C@@H:11]([CH2:28][O:29][C:30](=[O:35])[C:31]([CH3:34])([CH3:33])[CH3:32])[O:10][C@H:9]1[O:36][C:37]1[C:45]2[C:40](=[N:41][CH:42]=[CH:43][C:44]=2[CH2:46][CH2:47][C:48]2[CH:53]=[CH:52][C:51]([O:54][C:55](=[O:60])[C:56]([CH3:59])([CH3:58])[CH3:57])=[CH:50][CH:49]=2)[NH:39][N:38]=1)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].C(=O)([O-])[O-].[Cs+].[Cs+].Br[CH2:68][CH2:69][CH2:70][O:71][CH2:72][C:73]1[CH:78]=[CH:77][CH:76]=[CH:75][CH:74]=1.[I-].[Na+]>CC(C)=O>[CH2:72]([O:71][CH2:70][CH2:69][CH2:68][N:39]1[C:40]2=[N:41][CH:42]=[CH:43][C:44]([CH2:46][CH2:47][C:48]3[CH:49]=[CH:50][C:51]([O:54][C:55](=[O:60])[C:56]([CH3:59])([CH3:58])[CH3:57])=[CH:52][CH:53]=3)=[C:45]2[C:37]([O:36][C@@H:9]2[O:10][C@H:11]([CH2:28][O:29][C:30](=[O:35])[C:31]([CH3:33])([CH3:34])[CH3:32])[C@@H:12]([O:21][C:22](=[O:27])[C:23]([CH3:26])([CH3:25])[CH3:24])[C@H:13]([O:14][C:15](=[O:20])[C:16]([CH3:17])([CH3:19])[CH3:18])[C@H:8]2[O:7][C:1](=[O:6])[C:2]([CH3:3])([CH3:4])[CH3:5])=[N:38]1)[C:73]1[CH:78]=[CH:77][CH:76]=[CH:75][CH:74]=1

Participants

6

Reactant 4

HCID 5238Sodium IodideHCID 10796Cesium carbonateHCID 2776064Benzyl 3-Bromopropyl EtherHCID 673408983-(2,3,4,6-Tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-4-[2-(4-pivaloyloxyphenyl)ethyl]-1H-pyrazolo[3,4-b]pyridine

Product 1

HCID 866143901-(3-benzyloxy-propyl)-3-(2,3,4,6-tetra-O-pivaloyl-beta-D-glucopyranosyloxy)-4-[2-(4-pivaloyloxyphenyl)ethyl]-1H-pyrazolo[3,4-b]pyridine

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a solution of 3-(2,3,4,6-tetra-O-pivaloyl-β-D-glucopyranosyloxy)-4-[2-(4-pivaloyloxyphenyl)ethyl]-1H-pyrazolo[3,4-b]pyridine (1 g) in acetone (10 mL) were added cesium carbonate (0.78 g), benzyl 3-bromopropyl ether (0.32 mL) and a catalytic amount of sodium iodide, and the mixture was stirred at room temperature for 2 days. The reaction mixture was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=4/1−2/1) to give 1-(3-benzyloxy-propyl)-3-(2,3,4,6-tetra-O-pivaloyl-β-D-glucopyranosyloxy)-4-[2-(4-pivaloyloxyphenyl)ethyl]-1H-pyrazolo[3,4-b]pyridine (0.77 g). This material was dissolved in methanol (10 mL). To the solution was added 10% palladium-carbon powder (0.25 g), and the mixture was stirred at room temperature under a hydrogen atmosphere for 2 hours. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate =1/1−1/2) to give the title compound (0.54 g).

Workup

  1. customThe reaction mixture was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=4/1−2/1)

Sources & evidence

ORD record
ord-38e9de450ab541679ca626c8c0eac9ac
Source dataset
uspto-grants-2008_05
Patent number
US07375113B2

Reaction notes

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